Attachment for adding machines



June 29,1926. 1,590,946

J. R. KAISERMAN ATTACHMENT FOR ADDING MACHIN3S Filed May 25, 1924 INVENTOR, Jacofi fiJELwerm/an ATTORNEYS. r141 Patented June 29, 1926.

UNITED STATES PATENT OFFICE.

JACOB RUDOLPH KAISERMAN, 0F LIVINGSTON, MONTANA.

ATTACHMENT FOR ADDING MACHINES.

Application filed May 23,

This invention relates to adding int-whines, and has particular reference to a simple and etlicient attachment thereto.

An object of the invention is to provide a simple, eilicient and durable attachment which can be very readily applied, to or removed from an adding machine and which when applied will effectively prevent the operation of the adding machine unless certain designated parts are in the proper position.

Another object concerns the provision of an attachment which can be very readily applied to and removed from an adding machine, and its attachment or removal will in only a very minor respect require an alteration of the construction and arrangement of the parts of most of the machines now in use.

A further object concerns the provision of an attachment so simple in its construction and operation that it can be applied to an adding machine with very little ere penditure of time and labor and at a very small cost.

The invention is illustrated in the drawings, of which- Figure 1 is a simple diagrammatic side elevation of the parts involved, showing them in a normal position;

Fig. 2 is a similar View showing the parts in an abnormal position; and

Fig. 3 is a perspective view of the attachment.

The form of the invention shown in the drawings is a preferred form, although it is understood that modifications in the construction and arrangement of the parts and in the character of the materials used may be adopted without departing from the spirit of the invention as set forth in the appended claims.

More specifically the invention concerns the provision of a slidable bar or element extending between a paper-carrying mechanism and the controlling key mechanism of an adding machine. This slidable bar is responsive to the movement of the papen carrying mechanism from a normal to an abnormal position, and a projection carried by the slidable bar is moved into the path of operative movement of the con trolling key or bar when the paper-carrying mechanism is not in the normal position so as to obstruct the operative movement of the controllng key mechanism and pre- 1924. Serial No, 715,380.

vent the operation of the machine until such time as the paper-carrying mechanism has been restored to a normal position.

More specifically still, the invention co.m prises a single be r slid-ably mounted on the frame of the machine and having one end bearing against a portion of the papercarrying mechanism. This bar is constantly under the pull of a spring, tending to hold it against the paper-carrying mechanism, so that as this mechanism is moved from the normal to an abnormal position the slidable bar will move from a normal to an abnormal position. The other end of this slidable bar disposed adjacent the operating or controlling key mechanism, and in the normal position of the slidable bar is not adapted to prevent the operative movement thereof. bin in the abnormal position of the slidable bar a projection or lip on the slid able bar is disposed in the path of operative movement of the controlling key mechanism so as to prevent a suficient movement of said controlling mechanism, whereby the operation of the machine is prevented.

The preferred embodiment of the invention saown in the drawings, which of course, is only one form in which the idea may be applied, shows a frame 1 of an adding machine in which is suitablv mounted a carriage 2 adapted to support a sheet of paper 3. Against this paper a plate 4 bears. This paper-carrying mechanism is disposed rearwardly of a back plate 5 having an aperture 6.

Through this aperture the end 7 of a slidable bar 8 extends. This bar at its other end 9 is U-shaped and embraces a stub shaft or other supporting projection 10 by which it is supported and on which it is free to slide to acertain extent. Adjacent this end of the slidable bar there is disposed a controlling rod 11 the movement of which is controlled hy a controlling key 12 and a spring 13 which in any suitable and well-known manner will pull the rod or bar 11 upwardly to perform certain operative func tions, not necessary to describe. On this end of the slidable bar 8 there is disposed a stop means in the form of a projection or lip 14 which, as shown at Fig. 1, is disposed out of the path of movement of any part of the. controlling bar 11 but adapted, when moved to the position shown in Fig. 2, to be disposed in the path of movement of a portion 15 of said controlling bar 11 to prevent any further upward movement of said bar 11 beyond the position shown in Fig. 2.

The end of the bar 8, adjacent the papercarrying mechanism, is slotted, as shown at 16, and in this slot a screw or other pin 17 rides. The bar 8 is normally held against the paper-carrying mechanism by the pull of a spring 18 one end of which istastened to the bar 8 and the other end of which is fastened to the frame 1.

In the position or the parts shown in Fig, 1, which is supposed to be the normal position of the parts, the end 7 of the bar 8 bears aeainst a portion oi the paper-carrying mechanism. 'lhis portion is shown as the plate 4-.. It is to be understood, however, that the bearing surface mav be the paper carriage 2 itself, or the paper 5, or any other portion of this mechanism; Upon the depression of the key 12, in a well-known manner, the mechanism is set into action by the initial depression of the bar 11, and then the upward movement of the same for the purpose of operating the adding; machine and making a proper record on the paper 3v However, the upward movement of the rod 11 beyond the position shown in Fig. 1 is necessary to cause the operative movement or the machine. In the position shown in Fig. 1 the stop member or lip 14; is not in position to prevent the upward movement, but if the paper-carrying mechanism moves from the normal position shown in Fi 1 to an abnormal position, shown in Fig: 2, for one reason or another, the spring 18 will pull the slidable bar 8 to the right and this movement will cause the interposition of the lip 1-4: in the path of movement of the controlling bar 11, so that the upward operative movement of this bar 11 is prevented and, therefore, the operation of the machine is impossible until the slidable bar 8 has been moved back to normal. This can, of course, be done by the hand of the operator if he deliberately desires to effect this operation with the paper-carrying mechanism in an abnormal positionqbut thenormal intention is to maintain the slidable bar and its stop mechanism in the position shown in Fig. 2 until the paper-carrying mechanism has been moved back to normal and by this movement has movedthe slidable bar back to its normal position.

What 1 claim is 1. In an adding machine a paper carriage having; a normal POSlLlOD in which a printing action can take place and an abnormal position in which the printing action is to be prohibited, a controlling key having a path of operating movement, asingle slida ble bar extendingbetween the carriage and the key, means for moving said bar in re sponse to the movement of the carriage and means on said bar adapt-en to be disposed in the path of movement of the controlling key when the carriage has been moved out of its normal position.

2. In an addii 1 machine a paper can riage, a C-Oi1t1Oill11 y mechanism, a single slidableplate extendingbetween. the carriage and the key, one end of said plate adapted to. bear against a portion of the paper carriage, means for holding said plate against said carriage, said plate being movable in response to the movement of the paper carriage away from its normal. position in which a printing action may take place and stop means carried by the slidable plate to bra interposed in the pathoi operative movement of the key when the paper carriage is out of normal position and when it is therefore desired to prohibit the printing action.

JACOB RUDOLPH KAISERMAN. 

